Microsoft PowerPoint Viewer - Microsoft PowerPoint Viewer is one of the powerful applications that allow you to access the familiar tools to create, edit, view, present, and share presentations in no time from any location.
Documize - Enterprise-grade wiki and knowledge management platform
PPTX Viewer - PPTX Viewer is one of the lightweight applications that allows you to view, create, edit and share your presentation without facing any advertisement issue.
HackMD - Fast and flexible, real-time collaborative markdown, inspired by Hackpad.
GitPitch - The Markdown Presentation Service on Git
ReadTheDocs - Spend your time on writing high quality documentation, not on the tools to make your documentation work.